CN104964852A - Annular sealed tank sampling device with automatic compensation function and sampling method - Google Patents
Annular sealed tank sampling device with automatic compensation function and sampling method Download PDFInfo
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- CN104964852A CN104964852A CN201510406672.7A CN201510406672A CN104964852A CN 104964852 A CN104964852 A CN 104964852A CN 201510406672 A CN201510406672 A CN 201510406672A CN 104964852 A CN104964852 A CN 104964852A
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- peristaltic pump
- annular closed
- closed tank
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- thief rod
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Abstract
The invention discloses an annular sealed tank sampling device with an automatic compensation function and a sampling method. The device comprises a sampling rod, a first peristaltic pump, a second peristaltic pump, a tee valve, a sample storage and a compensation device, wherein the tee valve is connected to the sampling rod, the first peristaltic pump and the second peristaltic pump through flexible pipes, the first peristaltic pump is communicated with the sample storage, the second peristaltic pump is communicated with the compensation device, the sample storage and the compensation device are respectively arranged on a lower support and an upper support of a supporting table, the sampling rod is inserted into an annular sealed tank, and the tee valve, the first peristaltic pump and the second peristaltic pump are all subjected to sequential control of a controller. An equivalent volume method is adopted to ensure that the volume of a taken sample is equal to that of water added for compensation, so that the total water amount of the tank is maintained to be constant, various water power parameters are guaranteed to be unchanged in a test, and the accuracy and repeatability of experimental results are improved.
Description
Technical field
The present invention relates to a kind of annular closed tank sampler and the sampling method with automatic compensation function, belong to annular closed flume test and to take a sample to research field.
Background technology
In the water body of natural river, generally all contain a certain amount of silt, it all can produce material impact to the fluidal texture characteristic, evolution law of river course, hydraulic engineering construction etc. of current.At present, main dependence site test and straight tank shop experiment are studied, but, straight tank limited length, and enter head piece and go out head piece and all have impact to current, annular closed tank is more suitable for the interphase interaction rule of research water sand and the Transport And Transformation mechanism of pollutant.Annular closed tank can simulate the straight tank of endless theoretically, and its advantage is: its water body environment is closed, without the physical boundary become a mandarin and go out to flow; Do not need water recovery apparatus and energy-dissipating installation, do not destroy the coagulation of silt; Easy to operate, the test depth of water, sediment concentration, water velocity can regulate easily.
The adsorption test of silt to pollutant is the representative test of research pollutant transportion and transformation between water body and silt, mainly comprises kinetics of adsorption test and isothermal equilibrium adsorption test.Present stage, in annular closed tank, carry out test sampling, annular closed tank must be stopped to rotate could be sampled, the continuity of impact test and rationality.Each sampling time point need take out water sample from tank, detects the concentration of pollutant in now water body.Meanwhile, each take out the sample of certain volume after, in tank, the water yield can corresponding minimizing, if every sub-sampling 100ml, test sampling 50 times for one group, in tank, the water yield can reduce 5000ml, namely can reach more than 1% relative to the change of total Water.
Water loss can have an impact to water flow structure in tank, and water level reduces, and flow velocity changes, and even the motion state of silt also can change.In addition, water loss can cause the husky ratio of water to change, and then affects adsorption process.So, the automatic compensating method sampled need be considered, reduce or eliminate because the water yield changes the experimental error caused.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of annular closed tank sampler and the sampling method with automatic compensation function, when ensureing to sample, water sample overall volume is constant, hydrodynamic condition in process of the test is not changed, ensures the accuracy of experimental result.
Technical scheme: for solving the problems of the technologies described above, the annular closed tank sampler with automatic compensation function of the present invention, comprise the first peristaltic pump, second peristaltic pump and T-valve, described T-valve connects thief rod respectively through flexible pipe, first peristaltic pump and the second peristaltic pump, thief rod is arranged on annular closed tank by stationary installation, first peristaltic pump is communicated with sample container, second peristaltic pump is communicated with compensation system, sample container and compensation system are positioned over supporting station lower carriage and upper bracket respectively, sample memory and compensation system shape are down infundibulate, and volume is identical.
As preferably, described stationary installation comprises fixed block, lock-screw and latch, fixed block is arranged on annular closed tank top, center is provided with thief hole, respective annular airtight tank upper cover plate place is provided with formed objects hole, pin diameter is identical with thief hole diameter, and latch inserts thief hole rear lower and flushes with annular closed tank upper cover plate lower plane, when guaranteeing that annular closed tank rotates thief hole and latch noiseless to flow-shape; The side of fixed block is provided with threaded hole, is provided with lock-screw in threaded hole, and the head of lock-screw is provided with the teflon latch segment of arc-shaped, drives teflon latch segment extruding thief rod thus locking thief rod by tightening screw.
As preferably, one end that described thief rod is positioned at annular closed tank is provided with filtration unit, and filtration unit is oval spherical, and cross section shapes be oval, and longitudinal section form is for justifying, and both ends open diameter is 5D
50, interlude diameter is (10-15) D
50, D
50for the median particle diameter that test is husky, in the middle part of filtration unit, be provided with screen pack.
An above-mentioned sampling method with the annular closed tank sampler of automatic compensation function, comprises the following steps:
(1) latch inserts thief hole, and annular closed tank rotates, and after rotating certain hour, extracts latch, inserts thief rod, and adopts teflon latch segment to fix thief rod;
(2) controller controls T-valve, opens the first peristaltic pump, and close and the second peristaltic pump interface, the silt-including water in annular closed tank is delivered to sample memory via filtration unit, thief rod and T-valve by the first peristaltic pump;
(3) sample memory has sampled rear controller and has controlled the first peristaltic pump stopping action, closes T-valve the corresponding interface;
(4) controller opens the second peristaltic pump and corresponding T-valve interface, replenisher in compensation system is pumped in annular closed tank via T-valve, thief rod and filtration unit, each institute sample thief is equal with replenisher volume, thus realizes water balance before and after sampling.
(5) extract thief rod, insert latch, cyclic test;
In the present invention, annular closed tank is provided with upper cover plate, covers on tank top, form sealing flume, cause tank to sample difficulty large, direct perforate, has impact to fluidised form, thus stationary installation and bayonet fashion is adopted, latch inserts thief hole, and bottom flushes with upper cover plate, then just noiseless to fluidised form, insert again during sampling, guarantee that fluidised form meets working condition requirement.Sample memory and compensation system shape are down infundibulate, and volume is identical, guarantee that sample volume is equal with supplementary volume, and it is guarantee that wherein solution is all pumped into annular closed tank that compensation system is inverted.
Beneficial effect: the annular closed tank sampler with automatic compensation function of the present invention, concrete following advantage:
1, the present invention utilizes peristaltic pump to carry out automatic sampling, and can save time, sample volume is accurate.
2, the present invention can filter silt when sampling, and avoids sampler to block; During supplementary water sample, current can be attached to the airtight tank of sand grain refunds on screen pack.
3, the present invention devises sampling autocompensation installation, can ensure that the volume of water sample while sampling in annular closed tank does not totally reduce, ensure water balance, hydrodynamic condition in process of the test is not changed, the suction-operated of silt to pollutant can not be affected simultaneously, ensure the accuracy of experimental result.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural drawing of filtration unit of the present invention;
Fig. 3 is the structural representation of lock-screw in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1 to Figure 3, the annular closed tank sampler with automatic compensation function of the present invention, comprise the first peristaltic pump 2, second peristaltic pump 3 and T-valve 1, three mouths of described T-valve 1 are respectively first interface, the second interface and the 3rd interface, first peristaltic pump 2 one end is by the first flexible pipe and the second orifice, and first peristaltic pump 2 other end is communicated with sample container 5 by the second flexible pipe 9; Second peristaltic pump 3 one end is by the 3rd flexible pipe and the 3rd orifice, and second peristaltic pump 3 other end is communicated with compensation system 4 by the 4th flexible pipe 13, on the lower carriage that sample container 5 and compensation system 4 are all placed on trestle table 14 and upper bracket; Described first interface is communicated with thief rod 8 one end, and thief rod 8 other end is inserted in annular closed tank 6, and T-valve 1, first peristaltic pump 2 is all connected with controller 10 with the second peristaltic pump 3.
In the present invention, described thief rod 8 is provided with the scale of display height, and can be used for accurately locating sampling depth, thief rod 8 is fixed on annular closed tank 6 by stationary installation 11.Stationary installation 11 comprises fixed block, lock-screw and latch, described fixed block is arranged on annular closed tank 6, center is provided with thief hole, respective annular airtight tank upper cover plate place is provided with formed objects hole, pin diameter is identical with thief hole diameter, and latch inserts thief hole rear lower and flushes with annular closed tank upper cover plate lower plane.The side of fixed block is provided with threaded hole, is provided with lock-screw 18 in threaded hole, and the head of lock-screw 18 is provided with the teflon latch segment 17 of arc-shaped, drives teflon latch segment 17 to extrude thief rod 8 thus locking thief rod 8 by tightening screw.
In the present invention, one end that described thief rod 8 is positioned at annular closed tank 6 is provided with filtration unit 7, and filtration unit 7 is oval spherical, and cross section shapes is oval, and longitudinal section form is circle, and described filtration unit 7 two ends diameter is 5D
50, interlude diameter gets (10-15) D
50, D
50for the median particle diameter that test is husky, in filtration unit 7, be provided with screen pack 15, avoid sand grain in sampling to enter thief rod 8 and block sampling passage, when supplementing water sample current can by the sand grain refunds be attached on screen pack 15 airtight tank 6.Described sample memory is identical with the volume of compensation system 4, and opening is all truncated cone-shaped, and controlled sample volume processed is identical with replenisher volume.
An above-mentioned sampling method with annular closed tank 6 sampler of automatic compensation function, comprises the following steps:
(1) latch inserts thief hole, and annular closed tank rotates, and after rotating certain hour, extracts latch, inserts thief rod, and adopts teflon latch segment 17 to fix thief rod 8;
(2) controller 10 controls that T-valve 1 the 3rd interface is closed, the second interface opens, and open the first peristaltic pump 2, the silt-including water in annular closed tank 6 is delivered to sample memory via filtration unit 7, thief rod 8 and T-valve 1 by the first peristaltic pump 2;
(3) sample memory has sampled rear controller 10 and controls the first peristaltic pump 2 and stop action, and T-valve 1 second interface is closed;
(4) the 3rd interface opened by controller 10, second peristaltic pump 3 action, replenisher in compensation system 4 is pumped in annular closed tank 6 via T-valve 1, thief rod 8 and filtration unit 7, and each institute sample thief is equal with replenisher volume, thus realizes water balance before and after sampling;
(5) extract thief rod 8, insert latch, cyclic test.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. there is the annular closed tank sampler of automatic compensation function, it is characterized in that: comprise the first peristaltic pump, the second peristaltic pump and T-valve, described T-valve connects thief rod, the first peristaltic pump and the second peristaltic pump respectively through flexible pipe, thief rod is arranged on annular closed tank by stationary installation, first peristaltic pump is communicated with sample container, second peristaltic pump is communicated with compensation system, sample container and compensation system are positioned over supporting station lower carriage and upper bracket respectively, sample memory and compensation system shape are down infundibulate, and volume is identical.
2. the annular closed tank sampler with automatic compensation function according to claim 1, it is characterized in that: described stationary installation comprises fixed block, lock-screw and latch, fixed block is arranged on annular closed tank top, center is provided with thief hole, respective annular airtight tank upper cover plate place is provided with formed objects hole, pin diameter is identical with thief hole diameter, and latch inserts thief hole rear lower and flushes with annular closed tank upper cover plate lower plane; The side of fixed block is provided with threaded hole, is provided with lock-screw in threaded hole, and the head of lock-screw is provided with the teflon latch segment of arc-shaped, drives teflon latch segment extruding thief rod thus locking thief rod by tightening screw.
3. the annular closed tank sampler with automatic compensation function according to claim 2, it is characterized in that: one end that described thief rod is positioned at annular closed tank is provided with filtration unit, filtration unit is oval spherical, cross section shapes is oval, longitudinal section form is circle, and both ends open diameter is 5D
50, interlude diameter is (10-15) D
50, D
50for the median particle diameter that test is husky, in the middle part of filtration unit, be provided with screen pack.
4. the sampling method with the annular closed tank sampler of automatic compensation function as described in any one of claims 1 to 3, is characterized in that, comprise the following steps:
(1) latch inserts thief hole, and annular closed tank rotates, and after rotating certain hour, extracts latch, inserts thief rod, and adopts teflon latch segment to fix thief rod;
(2) controller controls T-valve, opens the first peristaltic pump, and close and the second peristaltic pump interface, the silt-including water in annular closed tank is delivered to sample memory via filtration unit, thief rod and T-valve by the first peristaltic pump;
(3) sample memory has sampled rear controller and has controlled the first peristaltic pump stopping action, closes T-valve the corresponding interface;
(4) controller opens the second peristaltic pump and corresponding T-valve interface, replenisher in compensation system is pumped in annular closed tank via T-valve, thief rod and filtration unit, each institute sample thief is equal with replenisher volume, thus realizes water balance before and after sampling.
(5) extract thief rod, insert latch, cyclic test.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510406672.7A CN104964852A (en) | 2015-07-10 | 2015-07-10 | Annular sealed tank sampling device with automatic compensation function and sampling method |
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| CN201510406672.7A CN104964852A (en) | 2015-07-10 | 2015-07-10 | Annular sealed tank sampling device with automatic compensation function and sampling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105241688A (en) * | 2015-10-21 | 2016-01-13 | 核工业北京化工冶金研究院 | Water sample collecting system and method for surface water and spring water |
| CN109141991A (en) * | 2018-09-30 | 2019-01-04 | 西北核技术研究所 | A kind of aerosol on-line period device, aerosol quantified system analysis and method |
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Application publication date: 20151007 |